internal void ReloadConfigOnTimer(object state)
{
LoggingConfiguration configurationToReload = (LoggingConfiguration)state;
InternalLogger.Info("Reloading configuration...");
lock (this.syncRoot)
{
if (this.reloadTimer != null)
{
this.reloadTimer.Dispose();
this.reloadTimer = null;
}
if (this.IsDisposing)
{
return; //timer was disposed already.
}
this.watcher.StopWatching();
try
{
if (this.Configuration != configurationToReload)
{
throw new NLogConfigurationException("Config changed in between. Not reloading.");
}
LoggingConfiguration newConfig = configurationToReload.Reload();
//problem: XmlLoggingConfiguration.Initialize eats exception with invalid XML. ALso XmlLoggingConfiguration.Reload never returns null.
//therefor we check the InitializeSucceeded property.
var xmlConfig = newConfig as XmlLoggingConfiguration;
if (xmlConfig != null)
{
if (!xmlConfig.InitializeSucceeded.HasValue || !xmlConfig.InitializeSucceeded.Value)
{
throw new NLogConfigurationException("Configuration.Reload() failed. Invalid XML?");
}
}
if (newConfig != null)
{
if (this.KeepVariablesOnReload)
{
newConfig.CopyVariables(this.Configuration.Variables);
}
this.Configuration = newConfig;
if (this.ConfigurationReloaded != null)
{
this.ConfigurationReloaded(this, new LoggingConfigurationReloadedEventArgs(true, null));
}
}
else
{
throw new NLogConfigurationException("Configuration.Reload() returned null. Not reloading.");
}
}
catch (Exception exception)
{
//special case, don't rethrow NLogConfigurationException
if (exception is NLogConfigurationException)
{
InternalLogger.Warn(exception, "NLog configuration while reloading");
}
else if (exception.MustBeRethrown())
{
throw;
}
this.watcher.Watch(configurationToReload.FileNamesToWatch);
var configurationReloadedDelegate = this.ConfigurationReloaded;
if (configurationReloadedDelegate != null)
{
configurationReloadedDelegate(this, new LoggingConfigurationReloadedEventArgs(false, exception));
}
}
}
}